MARSO: ORC Rating

GPH

732.6

OSN

710.9

LOA

10.284 m

Displacement

5725 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5457

Medium

0.7402

High

0.8628

Triple Offshore

Low

0.7051

Medium

0.929

High

1.0481

Boat Specifications

Dimensions

Length overall: 10.284 m
Beam: 3.27 m
Draft: 1.87 m
Displacement: 5725 kg
Crew weight: 400 kg
Wetted surface: 24.51 m²

Sails

Mainsail: 23.56 m²
Genoa: 32.82 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 76.95 m²

Design

Type: DUFOUR 34
Builder: MICHEL DUFOUR
Designer: MICHEL DUFOUR S.A.
Year built: 1974
Stability index: 125.8

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,44.4,3.876985,52,4.28,60,4.54,75,4.73,90,4.8,110,4.89,120,4.73,135,4.3,146,3.859897,150,3.7
8,42.4,4.536496,52,5.07,60,5.35,75,5.58,90,5.81,110,5.94,120,5.78,135,5.3,146.6,4.80327,150,4.63
10,42,5.099948,52,5.73,60,6.01,75,6.21,90,6.46,110,6.55,120,6.47,135,6.15,145.5,5.70301,150,5.43
12,42.4,5.633381,52,6.18,60,6.38,75,6.53,90,6.76,110,6.89,120,6.84,135,6.62,147.1,6.217099,150,6.03
14,41.2,5.847837,52,6.4,60,6.58,75,6.74,90,6.88,110,7.19,120,7.16,135,6.94,150,6.4,150.5,6.376703
16,40.8,5.931347,52,6.5,60,6.7,75,6.91,90,6.99,110,7.45,120,7.48,135,7.26,150,6.68,172.7,6.109521
20,41.2,5.980743,52,6.54,60,6.75,75,7.1,90,7.34,110,7.72,120,8,135,7.87,150,7.14,177.2,6.71802

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.28	4.54	4.73	4.8	4.89	4.73	4.3	3.7
8	5.07	5.35	5.58	5.81	5.94	5.78	5.3	4.63
10	5.73	6.01	6.21	6.46	6.55	6.47	6.15	5.43
12	6.18	6.38	6.53	6.76	6.89	6.84	6.62	6.03
14	6.4	6.58	6.74	6.88	7.19	7.16	6.94	6.4
16	6.5	6.7	6.91	6.99	7.45	7.48	7.26	6.68
20	6.54	6.75	7.1	7.34	7.72	8	7.87	7.14

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.4°	2.77	146°	3.2
8	42.4°	3.35	146.6°	4.01
10	42°	3.79	145.5°	4.7
12	42.4°	4.16	147.1°	5.22
14	41.2°	4.4	150.5°	5.55
16	40.8°	4.49	172.7°	6.06
20	41.2°	4.5	177.2°	6.71

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.28	5.07	5.73	6.18	6.40	6.50	6.54
60°	4.54	5.35	6.01	6.38	6.58	6.70	6.75
75°	4.73	5.58	6.21	6.53	6.74	6.91	7.10
90°	4.80	5.81	6.46	6.76	6.88	6.99	7.34
110°	4.89	5.94	6.55	6.89	7.19	7.45	7.72
120°	4.73	5.78	6.47	6.84	7.16	7.48	8.00
135°	4.30	5.30	6.15	6.62	6.94	7.26	7.87
150°	3.70	4.63	5.43	6.03	6.40	6.68	7.14